One of the first steps you take when you are getting a good idea your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Detroit you can estimate when it's a good idea to plant brunfelsia by using the USDA zone info.

Planting Calendar for Brunfelsia

Frost tolerance for brunfelsia:	Not tolerant of frost.
When to plant:	After the last frost has passed.

Since brunfelsia require warm weather you have to wait until after the last frost has passed before you can plant them.

The earliest that you can plant brunfelsia in Detroit is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant brunfelsia and expect a good harvest is probably August. Any later than that and your brunfelsia may not have a chance to fully mature. Starting your brunfelsia indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Detroit. You can expect an average low temperature of -5°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Detroit is just an average and the actual date of last frost will vary from year to year. Since half of the time in Detroit there is a last frost after April 15 be ready to cover your brunfelsia if you have one of those late frosts.

USDA Zone Info for Detroit

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-5°F
Highest Expected Low	0°F

This means that on a really cold year, the coldest it will get is -5°F. On most years you should be prepared to experience lows near 0°F.

Plants to Grow in Detroit

You may be interested in your other planting guides for Detroit.